165308850 has 300 divisors, whose sum is σ = 567353754. Its totient is φ = 35562240.

The previous prime is 165308789. The next prime is 165308861. The reversal of 165308850 is 58803561.

It can be written as a sum of positive squares in 3 ways, for example, as 141776649 + 23532201 = 11907^2 + 4851^2 .

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 149 ways as a sum of consecutive naturals, for example, 9724042 + ... + 9724058.

Almost surely, 2^165308850 is an apocalyptic number.

165308850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 165308850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283676877).

165308850 is an abundant number, since it is smaller than the sum of its proper divisors (402044904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165308850 is an equidigital number, since it uses as much as digits as its factorization.

165308850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 165308850 is about 12857.2489281339. The cubic root of 165308850 is about 548.8226606289.

The spelling of 165308850 in words is "one hundred sixty-five million, three hundred eight thousand, eight hundred fifty".